Article (Scientific journals)
Evidence and analysis of 2012 Greenland records from spaceborne observations, a regional climate model and reanalysis data
Tedesco, M.; Fettweis, Xavier; Mote, T. et al.
2013In The Cryosphere, 7, p. 615-630
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Abstract :
[en] A combined analysis of remote sensing observations, regional climate model (RCM) outputs and reanalysis data over the Greenland ice sheet provides evidence that multiple records were set during summer 2012. Melt extent was the largest in the satellite era (extending up to ∼97% of the ice sheet) and melting lasted up to ∼2 months longer than the 1979–2011 mean. Model results indicate that near surface temperature was ∼3 standard deviations (σ) above the 1958–2011 mean, while surface mass balance (SMB) was ∼3σ below the mean and runoff was 3.9σ above the mean over the same period. Albedo, exposure of bare ice and surface mass balance also set new records, as did the total mass balance with summer and annual mass changes of, respectively, −627 Gt and −574 Gt, 2σ below the 2003–2012 mean. We identify persistent anticyclonic conditions over Greenland associated with anomalies in the North Atlantic Oscillation (NAO), changes in surface conditions (e.g., albedo, surface temperature) and preconditioning of surface properties from recent extreme melting as major driving mechanisms for the 2012 records. Less positive if not increasingly negative SMB will likely occur should these characteristics persist.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Tedesco, M.
Fettweis, Xavier  ;  Université de Liège - ULiège > Département de géographie > Topoclimatologie
Mote, T.
Wahr, J.
Alexander, P.
Box, J.
Wouters, B.
Language :
English
Title :
Evidence and analysis of 2012 Greenland records from spaceborne observations, a regional climate model and reanalysis data
Publication date :
04 April 2013
Journal title :
The Cryosphere
ISSN :
1994-0416
eISSN :
1994-0424
Publisher :
Copernicus, Katlenberg-Lindau, Germany
Volume :
7
Pages :
615-630
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 03 December 2012

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